page_title: Spark (fire)
section_title: Metal working
hierarchical_section_title: Spark (fire) / Metal working
caption_attribution_description: Spot Welding Robot
context_page_description: A spark is an incandescent particle. Sparks may be produced by pyrotechnics, by metalworking or as a by-product of fires, especially when burning wood.
context_section_description: Molten metal sparks can be created when metal is heated by processes such as Bessemer conversion of iron to steel or arc welding.
  Arc welding uses a low voltage and high current electric arc between an electrode and the base material to melt the metals at the welding point, which often creates sparks. To reduce the risk of burns, welders wear heavy leather gloves and long sleeve jackets to avoid exposure to extreme heat, flames, and sparks. In spot welding, metal surfaces that are held in contact are joined by the heat from resistance to electric current flow. It is common for a spray of sparks in the form of molten metal droplets to be ejected from the parts being joined. or the resistance heating of spot welding.
caption: Sparks from spot welding robot
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